8

CV Sub-Objects and Point Sub-Objects 1087
necessarilylieonthecurveorsurfacetheydefine.
The CVs define a
control lattice (page 3–1017)
that connects the C Vs and sur rounds the NURBS
curve or surface. The control lattice displays in
lines that are yellow by default.
Cone-shaped NURBS surface with its control lattice (CVs are
displayed as green squares)
Tip: When you use Zoom Extents, the entire extents
of a NURBS object are displayed, including its
control lattice. Because CVs can be located some
distance from an object, the curve or surface itself
(the object’s renderable geometry) is sometimes
hard to see. If th is happens, use Zoom Region or
Field of View to zoom in.
Yo u c a n m o v e a C V a t t h e Cu r v e C V o r S u r f a c e
CV sub-object level on the Modify panel. Other
transforms, rotate and scale, work as well. Rotate
and scale are useful mainly when you have selected
multiple CVs.
Moving and rotating CVs to change a surface (selected CVs
are displayed in red)
Each CV also has a weight, which you can use
toadjusttheCV’seffectonthecurveorsurface.
Increasing the weight pulls the surface toward the
CV. Decreasing the weight relaxes the surface away
from the CV.